Milling-machine.



G. T. TRUNDLE, In. MILLING MACHINE.

APPLICATION FILED Auenzs. ms.

Patented Feb. 13, 1917.

a satin-sun? 1.

' s. T. TBUNDLE', JR.

MILLING MACHINE. APPucAnou FlLEQ'AUG-ZS. 1:15.

' Patented Feb. 13,1917.-

G. T. TRUNDLE, Jn.

MlLLiNG MACHINE.

APPLICATION FILED AUG:26, l9l5- w 1 1,216,018. 1 Putented Feb. 13, 1917.

a SHEETS-sum a.

IJrG. 6 finsn'fok STATES PATEET omen.

GEORGE T. TRUNDLE, m or om. st um. onto, Ass gn negro 'rnn mnmoanmqctgx- GRAPH COMPANY, or CLEVELAND, ommitccnrona'rmn'or onto.

To'rrZl whom it may concern) Be it known that I, (inonuh T. Tnoxntn. .lri, a' citizen of the Vnited States,,residing at (.lleveland. in the county of (uyahoga and-x ltate of Ohio, have invented a certain new and useful lmprorement in Milling- Machines. of"\\h rrhthe following is a full,

, 'clearfai'ul exact description.referent-e being had to the accol'n 'iau viug drawings.

l The object of this invention is to provide a simple and accurate maehiuelor milling into an articletnim opposite sides. without the delay incident to turning the article. on

itselffas has heretofore been the practice.

To thcabove ends, I haredei'ised a machine which in its preferred form may comprise aholdertor sets of'artieleseml :1 se- 1:95:01 milling cutters (one more lfl fllllll'll'iel' than the articles to be cut atany particle "lar' time and mechanism for" movinglgtl e holder to successively present (hfierent sets of articles to the cutters. andmechanism for bod ly shifting the series of cutters relative to the articles in one direction andfthen in the opposite direction. enabling all the cutters but one at one end of the series to null one side of all the articles in a set. and there-' 7 afterfall the cutters except the oiie at the opposite end of the series't-o mill intothe'opposite side of all the articles in the set. The intention comprises the essential parts. of such combination of mechanisms, and. also the more particular. embodiment thereof illustrated 'inth'e tlra wings herein and hereinaftr more fully described.

Iii-(the; drawings, Figure 1 is 'a plan of my milling machineyFig. l -is a vertical section thereof substantially on the offset v line'2 -.-2 of Fig, 1'; Fig. 3 is a'detail, in

side. elevation, of clamping mechanism on that side the'niachine which is at th'e left. hand in Fig. 1; Fig.8; is a] side. elevation o;f the machine on a smaller scale tlian the preceding figures looking in the same general direction "as Fig 2'; Fig. 5 is a diagrammatic plan illustrziting'two positions ofthev sets of. cutters w th reference to the same objects,

MILLING-MACHINE.

Specification of Letters Patent.

Application filed August 26,1915. Serial to. 47,390;

in a set m; be vfllflflds'iisdsild ,Th

.13 and L4, which risefrom a Silltlllil b 1.8

able r tatil g spindles gl journal s n has fprefera bly a tapered shank Z3 ena ling itto bel'g'iri i eninto i'igid' operati'n v ment with the. s indle, To enabe it's re- 'moval, the spind c. has a loore'24 extending may be inserted to drive OiItJtImcIitte when s rocket 2i.

c min28 to a 'sprocket 29 (Fig; on aflr'ive Patented Feb. 19117:

which in th is case. are threaded plugs 6' is a face View ofsuch plug atter milled by this machine. t

In the p ae'ticular embodiment of the fnuv chine shown in the drawing, the In is adapted to' mill diametrically opposite notches a in the head a of a screw threaded,

plu'g A. Tl e machine acts on four; of these plugs at a 'ilmf, and hence five cutter.

prmfided so that there are cutters on" pinsite sides of everypl'ug. heir th plugs are brought into position forfcpe'ra 1-? tion, the fiva cutters stand in a central position along'si le of, but out. of contact with, the

various heat s; then the setof cutters'is sliift- 2d ed bodily ir onedirection to mill alhof the. notches in the left hand sidesfor exaitiplerq of the plugs, and thenshifted in the opposite directitn'to mill the other notches in the right hundisideL Each of the thic in 7 tel-mediate cuttersthus act first on oniplug and then oa the adjacentplug, \x hilejthe" two 'extr'emecutters are alternately iictive and idle.

The l1old r for the articles to be operatedon consists of a hollow rotary drum haw 'in'g cir cumjerential ribs 11 in'wlii ch'are in large number of radial open ngs 12 atla' ited to'be' oc'c'hlii ed by the plugs to be miflledf As shown tl'i'e 'e are four ribs and the-ctirre- 3 spending o enings in the (liit'erent'ribs'al so that tlraie are success ve iloii'gi rows or sets of four articlesie'ae The drawing sh )ws twelve sets offou'riopenings each; thou; h it is to be understoodtliiitiQthe number of gets and the number are" nings has an, ayia L shaft 16 j ournaled' 'n standiirds The milli ng cutters 20 re carri mta shifmble. cariiage'ggl lmni m men a to thebpp osite end thronghavhieh'. aj pin desired. Eachispindle-Bl is" provide shaft'30. Accordin ly, the rotation of the drive shaft rotates a l of the spindles simultaneously andat equal speed, each one turn ing in the opposite direction from its. neighbor. I'he milling cutters, however, are alternately reversed s0 that-the cutting edge isg rop'er for the direction of rotation given.

he carriage 22 is adapted to be shifted transversely of'the machine, a dove-tailed tongue and groove slideway 35 one portion 36 pf the bed being provided for this purposeiflT-he shifting is effected by a lever 38 which is pivoted to the bed at 39 and at' its forward ends forks around api'n 40 dependingfrom the' carriage; The rear end of the lever 38' carries a roller 42 which occupies. the .groove 43 of a double crown cam 44 on. a transverse shaft 45.. This shaft is shown as provided with a worm wheel 47 meshing with =L \vorm 48- on the drive shaft By reason'of-the sprocket chain drive for the spindles they 'may be shifted trans- ,versely without interfmjngavith thein rota- 's'ftiiini "When" the "shafbBO rotated;- t-he spindles are notonly driven, but the carriage 1s shifted in accordance with the groove of the cam 44. This cam s so, shaped that it-shifts the spindles from the central position, first in one direction andthen in .the opposite direction, past the central. nojnt to an equal distance at the other side, tli'ein back to the-central point, wherea straight portion of the cam holds the spindles'in position for a definite tim'e. llnring this period of rest in the trrfi'ei ofthe spindles the drum 10 is given a partial rotation to present a fresh set of plugs to the cutters.

This positionlng of the work will 'now be described. v

- Rigid on the drum 10 a ratchet wheel having as many notches 56 as, there are set of openings for the plugs. Mounted linsly on the-shaft it? is .an arm 57 which carries a pawl 58 lnr'ving'a nose 59 adapted {to enter the notches 56,-;the pawl being gi ven in' 'i'n'wardtendency thespringfit). A

linkfl'jl ifpivote'd at its forward end to At its rear end -it has a slot 62 passing'around a crank pin 63 carried by the transverse shaft 45. This crank pin crank pi tends to keep thc link snugly is shown as being on the face of, acam 65, the purpose of which will be presentlydescribed" ,Aspring 66 connected with, the

linkftil: a l with a strapitw jlrmse on the against the pin.

Referring to Fig. '4 and assuming that \the cam is rotating in the direction of thearrow,, it will-be seen that, for approximate'ly' a quarter of atu-rn following the position shown, the in 63 pulls on the i spring-{66 and thus raws the link ()1 to the right, which carries the pawl 58 toward the right beyond the 'next notch 56,;the inregistration with the nose 70.

. place.

cline of the notch forcing the pawl out'of it whenever the link pulls'the pawl. During the next quarter rotation, the movement is idlc,the pin traveling in the slot to the right hand end thcreof'and stretching the spring. During the upper right hand quarter (approximately speaking) of the rotation of t e crank pin its movement is again idle, traveling from the right hand of the slot 62 to the left hand end. Then during the remainder of the rotation, the pin shoves on the link, carrying the pawl 58 to the left, which movement causes the nose 59 to engage the next notch 56 and turn the drum on its axis the distance between adjacent notches. thus presenting 'to the spindles a fresh set of plugs.

The drum is accurately centered with reference to the spindles each time a fresh set of plugs is presented by a tapered projec 'tion 70 which enters a correspondingly tapered notch 71 in the drum and accurately positions it and locks it. This projection 70 consists of a nose on the upper arm 72 of :vbell crank which is pivoted at 73. The other arm 74 of the bell crank carries a roller 75 which is acted upon by the projcction 70 of the cam 65, tends to maintain the roller 75 in engagement with the cam.

Just before the left hand shoving of the c'i'a'nk pin 63 on the link 61 takes place, which would rotate the drum ilS heretofore described, the cam projection '76 engages the roller 75 and withdraws the locking projection 70 from its notch 71, freeing the drum. 'lhen-the shoving'on the link 61 turns the .drum so that the notch is out of "hen the projection 76 clears the roll 75. therefore, the nose 70 rides on the face of thc'druin until the turning of the-drum brings another notch opposite the nose. Then the nose springs-into it under the influence. of the spring Wand thus centers and log-ks the drum.

A spring 77 It will thus be .secn that, for every rotation of the shaft 45, the drum is unlocked and given a turn sufiicient to carry a fresh row of plugs intoposition for engagement by thecutt ers, the milled row being swung dowmvardly to'idle position, The plugs are placed by hand in the openings in the upper portion of the drum while the cutting operation of the horizontal row is taking After the cutting is completed and the drum rotates to bring a fresh row or rows into' engagement, the finished row isejected from the drum.

The ejection of' the milled articles is effected automatically by spring fingers 80 on the end of the sm'ing'plate 81, which is carried beneath the drum and extends gradually toward it, the fingers lying between thefribs on the drum. The fingers thus ei'igage beneath the heads on the plugs and, as the drum rotates. these lingers gradually cam the plugs out of the drum. The engagement begins as the plugs turn from their llOIlZOlltill position to tlie lirst position beneath the horizontal. hut is not completed until they come into the second or tllllTtPOSltll'H'l, as shown in Fig. 2. \Yhen they are finally camined out of the drum,

the plugs fall on a suitahle trough H5. downwhich they slide by gravity to the discharging point. i r To insure the plugs heing firmly seated on the drum during tluf-auilling operation I providea set of rock arms ill). one for ea h pin}: heing milled. These arms are pivoted on a rod 91 and are adapted to he forced toward the plugs hy the turning of a flattened hai 92. which lies against the arms. his hair is turned hy' a cam 94 (Figs. 1 and 3) on the end of the shaft in. this cam de pressing one end of a lever US. the other end Elli ot" whicl acts' against a rock arm 97 on the rod 92. The cam 9+ is timed to cause these arms t hear against the plugs just he'l'ore the milling hegins and continue until the milling is completed. Then they swing hack to idle position a'short distance away from the plugs. The levers 90 extend upwardly, as shown atllfi. and thus provide means to engage any plugs which may he projecting. and cam them against their seats.

In the operation of my machine. power is supplied continuously to the main shaft 30, which isshown as provided with tight and loose pulleys 100 and 101 'for this purpose. 'I'he-plligs are placed hy hand in the openings in the upper portio 40 during the periods when the drum is stir tionary. The l'nechanism descrilwd for turning the drum then hi-lugs onerou' after another successively into the horizontal position, lochs" the drum at such time. and forces the plugs snugly to their sides. Then the set of milling cutters shifts in one direction and rapidly mills the notches r! in one side of each plug: then the cutters move in the opposite direction, drawing out of the Imtches milled. and milling correspomling notches in the opposite sides'ot the plugs, and then they return to their first or intermediate position. In this position they dwell a short time. during which the drum is released and turned to bring a ,r'reish set of plugs to operative position and the fin ished set a "e carried (.lownwardlyand eventually automatically stripped from the drum and deliver tl'ieniselves hv gravity.

It will he seen that the operation may he extrel'nely rapid. By arranging the stock in a row and utilizing the intermediate cutters to operate first on one article and then on the opposite side of the adjacent article I I minimize the idle time ofthe cutters. In

milled. a

.1 the drumrcnt rows. a nd 'means for effecting a l trans verse moven ent hctween the articles and cut conjunctio 1 with this rapidity of operation. there is a simplicity of mechanism and an. accuracy I 1' movement. which are also important ptints in my invention, l

llaving' hus i-lescrihed my invention, what I claim is 1. in a milling machine. the combination a of means 'lll carrying a set of objects to be,

;et ofcutters extending respectively between adjacent ohjec s, and' me'ans for shifting one of said sets relatively to the other set U cnahle thesame cutter-to acton adjacent si [es of adjacent objects;

2. In a 1iillingmachine. the coinhinatiolr of a plurality of rotary cutters. a deyice adapted to hold a series of ohjectsin a row, means for moving said device 'to positioir' ditlerent ol jects in the row successively hetween' the cutters, means for causlnga relative shitting hetween the work and tluwsetoi cutters first in one direction an'd' tlien hack and c1 ntinued in the opposite (1irectioin fi to cnahle milling first on one side ol 'a'nailijcct and tl: en on the opposite sidcof the same ohjecl.

In a nilling machine. the com-hi'nation, with means forholding the work. ofa plu rality ol:' m lling cutters respectivelyon opposite sides of the work. parallel rotatable spindles to. the cutters. means "for bodily shitting tln set of spindles transversely"of their axes .vithout changing theirIl'Illtll-lllml. relation tll'lt while they are rotating-to enahle milling first onm'icside of the work -lnd then on tlu opposite side, and means for moving the work transversely of the plane in which tlu axesot' thecutter spindles l I l. 'lhe co nhii'iation. with arotary drum adapted .to hold a plurality of eirclu'nt'erential rows it articles to hemilledgacutter 5 adapted to extend betweenarticlesof ad jater to cause the same cutter to act :first against -one side of one article and then against the ad acent side of the adjacent v article.

The co nhination of a holder h 'a'\ "ing means for carrying a plurality ofysets of articlesto h. milled, a set oi cutters project- 15 ing respecthely into the spaces hetweenthe sets of articl s. means for moving the holder. relative to the] cutters in one direction to present a new set of articles to the cutters and move away the completed set, means for rotating the cutters. and autonnaticf means for periodic: lly shifting the set of cutters bodily tdwar l and from the work.

(S. The col ihination. with a rotary drum for holding plurality of sets of articles to he milled. a .eet olicuttm's adapted to extend rrsrmctively between the articles in a which is in position to he cut, means for rotating the drum step by step topres'ent,

fresh sets of irticles to cutting position amd remove completed sets. means for causing a relative shifting parallel of the axis of the drum between a set of articles and the cutters to effect the milling, and means for continuously rotating thecutters.

7, 'The combination of a movable holder having means for carrying articles to he milled in a plurality of rows, a row of cutters, means for rotating the individual cut ters, means for shifting the holder to bring a row of articles into coiiperation with the row of cutters, the cutters extending between the articles, and means for then shifting the cutters relative to the articles, first in one direction and then in the other to mill opposite sides of adjacent articles.

8. The combination of a holder having means for carrying articles to be milled in a plurality of rows, a row of cutters, means for rotating the individual cutters, means for positioning successive rows of articles relative to the cutters so that the cutters extend between and alongside of the articles, means for then shifting the cutters relative to the articles, first in one direction and then in the other to mill opposite sides of adjacent articles, the set of cutters comprising one more cutter than,there are articles in the row, whereby each article has a cutter on each side thereof.

a. row of articles to be milled, a shiftable carriage, a plurality of parallel spindles mounted therein, adjacent spindles having cutters adapted to extend respectively onto opposite sides of the same article, means for shifting the carriage first in one direction and then 1n the other past the original-position, and means for moving the row of articles transversely of the plane of movementof the carriage.

10. The combination, with a rotary drum for holding successive rows of articles to be milled, means for turning the drum stepby 5 step, a shiftable carriage, a plurality of parallel spindles mounted therein, each spindle having a cutter extending into the space alongside of a row of articles, and means for shifting the carriage laterally first in one direction and then in the other past the original position. 11. The combination of a shiftable car riage, a series of parallel spindles mounted therein, cutters carried by the respective spindles, means for continuously rotating the spindles, a movable holder for the articles to be milled ar -anged in a series of rows, and mechanism for holding the carriage stationary and moving the holder to present a fresh so row, and then shifting the carriage in one direction to carry a cutter toward one row, then in the opposite direction beyond the original position to carry said cutter toward the adjacent row and then back to the origi- 5 nal position.

The combination of means for holding 12..In a milling machine, the combina tion of a rotary drum adapted to hold a se-- ries of radially projecting articles in parallel circumferential rows, a row of cutters extending respectively between the circumferential rows of articles, means for rotating the drum step by step to bring a fresh set of articles into cooperation with the cutters, means for shifting the cutters bodily first in one direction and then in the other past the original position into cooperation with the articles of different rows, and means for rotating the cutters.

13. The combination of a rotary drum having means" for carrying a plurality of sets of articles, each set .extending along the periphery of the drum parallel with the axis thereof, a carriage shiftable parallel with the axis of theldrum, a row of cutters mounted in said carriage and, respectively extending into the spaces between articles in a set, means for turning the drum step by step to present a fresh row of articles to the cutters, means for shifting the carriage, and means for rotating the cutters continuously.

14.. The combination of means for holding articles in a plurality of sets, each set extending parallel with the adjacent set, the articles of each set being spaced apart and corresponding articles in the successive sets forming a row with a space between the rows, a series of milling cuttersnormally extending into such space, means for rotating the cutters, and means for shifting the set of cutters bodily to cause them to engage the sides of 'articles in a row. 7

15. The combination of a rotary drum having means for holding articles in a'plurality of sets, each set extending parallel with the axis of the drum, the articles of each set being spaced apart and correspond ing articles in the successive sets forming a circumferential row with a circumferential space between the rows, a series of milling cutters normally extending into such circumferential space, means for rotating the cutters, and means for shifting the set of cutters bodily to cause them to engage the sides of articles in a row. a

16. In a milling machine, the combination of a rotary drum, a set of parallel circumferential ribs on the drum, each rib having radial openings adapted to accommodate stock, the stock in the successive ribs forming transverse rows, a transverse row of milling cutters extending-into the circumferential spaces between the ribs, a shiftable carriage in which the .milling cutters are mounted, means for shifting the carriage from central position first in one direction, then in the opposite direction beyond the central position, and then backwardly to the central position, and means for rotating the cutters during such shiftin".

17. The combination of means for h0lding a rowof blanks to be milled, two rotary cutters oiropposite sides of said row, means for shifting the cutters laterally as a unit relatively to the row of blanks, and alternately in opposite directions, and means for movn'ig the device for holding the row of blanks to present a fresh blank to the cutters.

holder.

19. The con'ibination of means .for bolding two blanks to be n'lilled. a rotary cutter extending into the space between the blanks, n'ieans for causing relative lateral shifting between, the cutte and the two blanks as a unit, first in one direction thenin the opposite (liIGCtlOll.

20. The combination of means for bolding two rows of blanks to be milled, an intermediate rotary cutter, means for shifting the cutter relatively to the blanks from said intermediate position alternately in opposite directions. and means for moving'the (,lcviee which holds the blanks to present newablanks to the cutter.

21. The combination of a rotary work holder having means for holding two circumferential rows of blanks. a rotary cutter extending into the space between the rows, means for causing relative movement between the cutter and work holder. parallel with the axis of the holder, alternately in opposite directions past the idle point, and means for periodically rotating the work holder. i

The COIIlblIliltlOll of a rotar drum having a series of parallel circlm'rtercntial ribs, radialopeningsmrral'iged eql1idistantly in said ribs, the correspomling openings in adjacent ribs alinin", a set of cutters extending into the spaces between the ribs, means for turning the drum stepby step to carry a fresh, set of articles to the cutters and carry away a finished set, means for shifting the cutters parallel with the axis of the drum (during a pause in the movement of the drum) l'irst in one direction then in the opposite direction beyoml the initial point and then back to the initial point, and a stripping device adapted to engage finished articlss and withdraw them from :he drum.

23. The combinatirn of means for holdv ing two blanks to be milled, an intermediate',

rotary cutter extendi g between the blanks, means for shifting t .ie cutter laterally toward and fromthe llanks from the inter- IUGCllHtG posltwn firstin one direction and then back and in the back.

24. The combinatiox ipposite. direction and of means for holding two blanks to be milled, an intermediate rotary cutter, means tor shifting the cutter relatively to the blank: from said intermediate position first into engagement with one blank and thenback a id in the opposite direction into engagement with the other blank and back, and means for causing another relative movement between the work holder and cntterto bring fresh. blanks to the cutter.

Q5. The combination of a rotary. holder for two circumferential rows of blanks to be milled, a rotary cutte adapted to extend. into the circumferential space between said rows, means for shittil'g the cutter relative to and in the direction of the blanks first in one direction and then Jack and then in the opposite direction and back to enable the same cutter to mill articles in both rows, and means for r0tating said holder step by step to present fresh articles.

26. The combination 'i ith a rotary holder having a series of radial openings, whereby blanks may be carried )11 the periphery of the holder, a milling cvtter mounted on an axis normal to the holde r andextending beyond the path of the banks in the holder, and means for causing a relative shifting between the cutter and holder in a direction parallel with the axis of the holder.

7 27. The combination of means for carrying a series of'blanks to be milled, said blanks being; arranged radially about the periphery of tie drum, means for turning the drum step by step, a rotary cutter extending across the blank into the circlnnfcrential space alongside of the blanks, a spindle for the cutter, the axis of which is coincident with the. l:l(lllS of the drum, means for rotating the cutter spindle. and

means for bodily shifting the cutter spindle parallel with the axis'otl he drum while the spindle is rotating:

In testimony whereof, I: hereunto alfix my signature.

lIlORG-E T. 'lR-UNDLE, JR.

automatically v a drum having 100 

